<template>
    <div>
        <el-table ref="dataTable" :data="dataSource.list || []" :height="tableHeight" :stripe="options.stripe"
            :border="options.border" header-row-class-name="table-header-row" highlight-current-row
            @row-click="handleRowClick" @selection-change="handleSelectionChange">
            <!-- selection选择框 -->
            <el-table-column v-if="options.selectType && options.selectType == 'checkbox'" type="selection" width="50"
                align="center"></el-table-column>
            <!--序号-->
            <el-table-column v-if="options.showIndex" label="序号" type="index" width="60" align="center"></el-table-column>
            <!--数据列-->
            <template v-for="(column, index) in columns">
                <template v-if="column.scopedSlots">
                    <el-table-column :key="index" :prop="column.prop" :label="column.label" :align="column.align || 'left'"
                        :width="column.width">
                        <template #default="scope">
                            <slot :name="column.scopedSlots" :index="scope.$index" :row="scope.row">
                            </slot>
                        </template>
                    </el-table-column>
                </template>

                <template v-else>
                    <el-table-column :key="index" :prop="column.prop" :label="column.label" :align="column.align || 'left'"
                        :width="column.width" :fixed="column.fixed">
                    </el-table-column>
                </template>
            </template>
        </el-table>

        <!-- 分页 -->
        <div class="papination" v-if="showPagination">
            <el-pagination v-if="dataSource.totalCount" background :total="dataSource.totalCount"
                :page-sizes="[15, 30, 50, 100]" :page-size="dataSource.pageSize" :current-pare.sync="dataSource.pageNo"
                :layout="layout" @size-change="handlePageSizeChange" @current-change="handlePageNoChange"
                style="text-align: right"></el-pagination>
        </div>
    </div>
</template>

<script setup>
import { ref, computed } from "vue"

const emit = defineEmits(["rowSelected", "rowClick"]);
const props = defineProps({
    dataSource: Object,
    showPagination: {
        type: Boolean,
        default: true,
    },
    showPageSize: {
        type: Boolean,
        default: true,
    },
    options: {
        type: Object,
        default: {
            extHeight: 0,
            showIndex: false,
        },
    },
    columns: Array,
    fetch: Function,// 获数据的函效
    initFetch: {
        type: Boolean,
        default: true,
    },
});

const layout = computed(() => {
    return `total,${props.showPageSize ? "sizes" : ""
        },prev, pager, next, jumper`;
});
//顶部 60 ，内容区城距离顶部 20， 内容上下内间距 15*2 分页区域高度 46
const topHeight = 60 + 20 + 30 + 46;

const tableHeight = ref(
    props.options.tableHeight
        ? props.options.tableHeight
        : window.innerHeight - topHeight - props.options.extHeight
);
//初始化
const init = () => {
    if (props.initFetch && props.fetch) {
        props.fetch();
    }
};
init();
const dataTable = ref();
//清除选中
const clearSelection = () => {
    dataTable.value.clearSelection();
};

//设置行选中
const setCurrentRow = (rowKey, rowValue) => {
    let row = props.dataSource.list.find((item) => {
        return item[rowKey] === rowValue;
    });
    dataTable.value.setCurrentRow(row);
};
//将子组件暴露出去，否则父组件无法调用
defineExpose({ setCurrentRow, clearSelection });

//行点击
const handleRowClick = (row) => {
    emit("rowClick", row);
}
//多选
const handleSelectionChange = (row) => {
    emit("rowSelected", row);
}
//切换每页大小
const handlePageSizeChange = (size) => {
    props.dataSource.pageSize = size;
    props.dataSource.pageNo = 1;
    props.fetch();
}
// 切换页码
const handlePageNoChange = (pageNo) => {
    props.dataSource.pageNo = pageNo;
    props.fetch();
};
</script>
<style lang="scss" scoped>
.pagination {
    padding-top: 10px;
    padding-right: 10px;
}

.el-pagination {
    justify-content: right;
}

:deep .el-table_cell {
    padding: 4px 0px;
}
</style>